Estimacija koncentracija komponenata u kemijskim smjesama

scientific master's theses

• Title (english): Estimation of Component Concentration in Chemical Mixtures
• Author: Dražen Brščić
• Mentor: Nedjeljko Perić (mentor)
• Committee member: Ivan Petrović (predsjednik povjerenstva)
• Committee member: Nedjeljko Perić (član povjerenstva)
• Committee member: Želimir Kurtanjek (član povjerenstva)
• Committee member: Zoran Vukić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; (Department of Control and Computer Engineering); Zagreb
• Defense date and country: 2004, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering; Automation and Robotics
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

U ovom su radu analizirane metode estimacije koncentracije kemijskih komponenata u smjesama. Estimacija se obavljala na osnovi infracrvenog spektra smjese dobivenog mjerenjem pomoću FTIR spektra. U radu je dan pregled teorije povezane
s FTIR spektrometrijom. Prikazane su osnovne linearne metode koje se koriste u estimaciji. Dan je opis metoda odabira broja komponenata modela. Osim toga, prikazane su metode preprocesiranja spektra. Prikazana je i jednostavna nelinearne metoda estimacije. Algoritmi estimacije ispitani su najprije na simuliranim podacima, a zatim na stvarnim podacima dobivenim mjerenjem. Na kraju dan je komentar dobivenih rezultata, te je dan zakljuèak o pogodnosti korištenja prikazanih metoda kod opisanog problema.

Abstract (english)

In this thesis, methods for estimation of chemical component concentrations in mixtures were analysed. The concentrations are estimated from infrared spectra of the mixture obtained from the FTIR spectrometer. An overview of the theory connected with FTIR spectroscopy was given. Basic linear estimation methods were described. A description of methods for choosing the number of model components was given. Moreover, spectra preprocessing methods were described. A simple nonlinear estimation method was also described. The described methods were tested; first on simulated data, then on measured real data. A comment of obtained results was given at the end. Also, a conclusion on the applicability of the described methods on the research problem was given.

• Keywords: Estimacija; spektrometrija; glavne komponente; preprocesiranje; neuronske mreže
• Keywords (english): Estimation; spectroscopy; fourier transform; principal components; preprocessing; neural networks
• Language: croatian
• URN:NBN: urn:nbn:hr:168:181478
• Study programme: Title: Postgraduate master programme in electrical engineering; Study programme type: university; Study level: postgraduate; Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-06-06 08:27:33